IRF3711ZCS Equivalent & Substitute Parts

Part Overview

The IRF3711ZCS is an N-Channel MOSFET manufactured by Infineon Technologies, designed for surface mount applications in the D2PAK package. This device features a 20V drain-to-source voltage rating with 92A continuous drain current capability and 79W maximum power dissipation. The IRF3711ZCS is classified as obsolete, making identification of functionally equivalent substitute components necessary for ongoing design support and procurement continuity.

Substiute Parts

IRF3711ZCS

Infineon TechnologiesIn Stock: 1974IRF3711ZCS Datasheet

Current PartRFQ

BUK9609-40B,118

Nexperia USA Inc.In Stock: 6360BUK9609-40B,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRF3711ZCS is evaluated based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• FET Type: Must be N-Channel MOSFET
• Drain to Source Voltage (Vdss): Substitute must equal or exceed 20V
• Continuous Drain Current (Id): Substitute must support the application's current requirements
• On-State Resistance (Rds On): Substitute must maintain acceptable power dissipation characteristics
• Operating Temperature Range: Must support -55°C to 175°C minimum
• Gate Voltage (Vgs): Must be compatible with drive circuitry

Mechanical Compatibility Criteria:

• Package Type: D2PAK (TO-263-3) surface mount configuration
• Mounting Type: Surface mount only
• Pin Configuration: 2 Leads + Tab standard

The BUK9609-40B,118 is identified as a manufacturer-recommended substitute based on these parameters.

Parameter Comparison

Engineering Selection Recommendations

The BUK9609-40B,118 serves as a functional substitute for the obsolete IRF3711ZCS based on the following engineering factors:

Electrical Compatibility: The BUK9609-40B,118 provides a higher Vdss rating (40V versus 20V), which ensures operation within safe margins for applications designed for the 20V IRF3711ZCS. The continuous drain current of 75A is lower than the original 92A specification; circuit designs must verify that this current rating is sufficient for the intended application. The on-state resistance characteristics (7 mOhm @ 25A, 10V) are comparable to the original device, supporting similar thermal performance in typical operating conditions.

Package and Mounting Compatibility: Both devices utilize identical D2PAK (TO-263-3) surface mount packaging with 2 leads plus tab configuration, enabling direct physical replacement on existing printed circuit boards without layout modifications.

Product Status and Compliance: The BUK9609-40B,118 is classified as Active, ensuring ongoing availability and manufacturer support. The device is ROHS3 compliant, meeting current environmental and regulatory requirements, whereas the IRF3711ZCS is RoHS non-compliant. The BUK9609-40B,118 carries AEC-Q101 automotive qualification, indicating enhanced reliability screening and process controls.

Temperature Operating Range: Both devices support the identical operating temperature range of -55°C to 175°C, ensuring thermal compatibility across all application environments.

Frequently Asked Questions (FAQ)

Q: Can the BUK9609-40B,118 be used as a direct replacement for the IRF3711ZCS?

A: The BUK9609-40B,118 is electrically and mechanically compatible with the IRF3711ZCS for most applications. Both devices share identical D2PAK packaging, operating temperature range, and comparable on-state resistance characteristics. However, the continuous drain current rating is lower (75A versus 92A), requiring verification that the application does not exceed 75A sustained current. The higher Vdss rating (40V) provides additional voltage margin and does not create compatibility issues.

Q: What are the key differences between these two devices?

A: The primary differences are: (1) Vdss rating: BUK9609-40B,118 is rated for 40V compared to 20V for the IRF3711ZCS; (2) Continuous drain current: BUK9609-40B,118 is rated for 75A compared to 92A for the IRF3711ZCS; (3) Power dissipation: BUK9609-40B,118 supports 157W compared to 79W for the IRF3711ZCS; (4) Product status: BUK9609-40B,118 is Active while IRF3711ZCS is Obsolete; (5) RoHS compliance: BUK9609-40B,118 is ROHS3 compliant while IRF3711ZCS is non-compliant.

Q: Are there any gate drive voltage compatibility concerns?

A: The BUK9609-40B,118 has a maximum Vgs rating of ±15V compared to ±20V for the IRF3711ZCS. Both devices are compatible with standard gate drive circuits operating at 5V or 10V logic levels. Designs using gate drive voltages exceeding ±15V must be modified to accommodate the lower Vgs(max) specification of the substitute device.

Q: Does the higher Vdss rating of the substitute create any circuit design issues?

A: No. A higher Vdss rating provides additional voltage margin and does not create circuit compatibility issues. The device will operate safely in applications designed for 20V operation. The higher voltage rating simply indicates the device can withstand higher drain-to-source voltages without breakdown.

Q: What should be verified before implementing this substitution?

A: Verify that the application's maximum sustained drain current does not exceed 75A. Confirm that gate drive circuitry is compatible with the ±15V Vgs(max) specification. Validate that thermal management is adequate for the substitute device's power dissipation characteristics in the specific application. Confirm PCB layout and component placement are compatible with the D2PAK package geometry.